diff --git a/pyproject.toml b/pyproject.toml
index 43587a2..ec0357f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -117,7 +117,7 @@ PRD = "https://github.com/YiAgent/openbot/blob/main/docs/prd/openbot-prd.md"
 dev = [
     "pytest>=9.0.3",
     "pytest-asyncio>=1.3.0",
-    "pytest-xdist>=3.6",        # parallel test runner for unit/contract layer
+    "pytest-xdist>=3.8.0",        # parallel test runner for unit/contract layer
     "pytest-recording>=0.13",   # pytest plugin wrapper for vcrpy
     "ruff>=0.15.13",
     "httpx>=0.28.1",            # FastAPI TestClient runtime